US1078871A - Plow. - Google Patents

Description

Y'front end and draws the plow.

LEWIS H. OLSON, OF MELVILLE, SASKATCHEWAN, CANADA, ASSIGNOR OF ONE-HALF T0 MARTIN ERICKSON, OF GALESBURG, NORTH DAKOTA.

PLOW.

amasar.

Specification of Letters Patent.

Patented Nov. 18, 1913.

Application filed .Tune 4,-1913. Serial No. 771,692. l

To zZ-Z whomvz't may conce/rn.'

ing is a specication.

My invention relates to plows, and the object is to provide a lplow which Vwill autof matically free itself from obstruction in the: ground without breaking or injuring any of `end issecured at26 to one of the side bars 4.

its parts or connections.

In the accompanying drawing, Figure 1 is a top view of my improved plow shown as attached to some means for drawing it. Fig. 2 is a side elevation of what vis shown vin Fig. 1. Fig. 3 is an enlarged partly sec` tional portion of Fig. 2, about as on the line L1-ain Fig. 4. Fig. 4 is an enlarged portion of Fig. 1. Fig. 5 is a detail view of oneof the spring devices arranged one at each side upon the beam sections of the plow.

Referring to the drawing-by reference numerals, 1 designates the share, 2 the mold board and 3 the landside of the plow. Suit- .ably-secured to said parts is a plow beam which is composed of two sections, 4 and 5g rJ-he front section 4.may be hitched by astaple 6, or other means, to a portion 7 of al tractor or otherdevice which 'supports said Said front section is bifurcated into two flat side bars of which one isoffset as at 4a in Fig. 1 so as to leave the required room for the insertion of a colter (not shown) in the front part of the section.V Said section is also providedin each side bar with a slotS and in the rear ends with slots` 9; The rear beam section is a fiat curved member inserted betweenthe rearward bars of the front section, and is` provided with t-runnions 10 having antifric-l tion rollers 11 moving in theslotsY 9, said rollers are retained bylarge washers 12 (seel v17 and has its ends projected outward through the slots 8 of the side bars and has one end provided with a large head 18 and the other with a. fixed washer 19 (see Fig. 4). Said pivot 16 is thus slidable in the .slots 8 while its head and washer aid in preu Be it known that I, Lnwrs H. OLSON, subject of the King of Great Britain, resid ing at the town of Melville, in the Province; of Saskatchewan, Canada, have invented ag new and useful Plow, of which the follow-g a rod 20, whose front end is pivotally seventing spreading ofthe bars of the front section 4. The trunnions 10 and a brace bolt 34 also aid in said act of preventing spreading. v

In the front end of the block 17 is secured cured at 21 to a hand lever 22, which is pivoted at 23 to one of the bars 4. In a recess `in the block 1'7 is a stud 24, to which is attached one end of a spring 25, whose other As best shown in Fig. 3, when the lever 22 is thrown forward to its limit the end 21 of the rod 20 will be'slightly lower than the vfulcrum 23 ofthe lever, and thus the spring 25 is held compressed and the roller 15 out ofthe notch 14 as long as the lever is in its 4forward position, but as soon as the lever is `raised and released the spring 25 will throw it to the full line position shown in `Figsl and 2 and the roller 15 into the notch 14 ofthe rear section, which section is thereby locked against premature tilting on its trunnions. Such tilting can only take place `if the operator pulls the lever 22 to its forward `position for hauling the plow idle in `one of the positions shown in dotted lines in fFig. 2; or, if the plow meets with so great 4a. resistance in the ground from rocks, roots of trees or thelike, that the front beam section moves forward on the rear section as far as the slot 9 will permit, thus permitting the front point laof the `cam 13 to pass 12, and its other arm connected by a contracting coil spring 31 with a bolt 32 Vwhich ,is slidable in said angular portion and is provided with a nut 33 by which to regulate the tension of the spring.

It is obvious that the spring arrangement just described and the roller 15 will sustain the strain of all ordinary plowing and for eXtra hard soil or other breakable obstructions a slight relative movement of the front beam section, faster than the rear section, will cause the rod 29 to partly tilt the beam 28 and thereby increase the tension of the spring 3l so that it will resist the receding of the rear beam section until the obstruction reaches the point of danger of breaking some part of the plow when the springs 31 will yield sufficiently to let the notch 11i leavethe roller l5. After the plow has passed over the obstruction its rear beam section may be turned to normal position again by backing the plow, or by hand, or by any other suitable means, and when thus turned the cam 13 will act on the roller l5 and compress the spring 25 until the roller l5 slips into the notch 14.

What l claim is l. In a plow, a plow beam composed of a `front section by which the plow is drawn, a rearwardly spring-pressed member mounted on the section and having a limited slidable movement in longitudinal direction of the section, a rear beam section pivotally secured to the rear end of the front section to tilt on a horizontal transverse aXis thereon and having a longitudinal play at said pivot joint, the front end of said rear section being adapted for engagement with the spring-pressed member, to prevent premature tilting of the rear section, and one or more springs arranged to resist rearward movement of the rear section.

2. ln a plow, a plow beam composed of a Vfront section by which the plow is drawn, a

rearwardly spring-pressed member mounted onthe section and having a limited slidable movement in longitudinal direction of the section, a rear beamsection pivotally se- Y cured to the rear end of the front section to tilt on a horizontal transverse axis thereon and having a longitudinal play at said pivot }oint, the front end of said rear section heine' adapted. for enUaGement Vwith the nu A b spring-pressed member, to prevent premature tilting of the rear section, and springs arranged to resist rearward movement or" the rear section, and a mechanism connected with said springs, for automatically increasing the tension of the springs, when the rear section slides rearwardly.

3. ln a plow, a plow beam composed of a front section by which the plow is to be drawn, a rearwardly spring-pressed member mounted on the section and having a limited sliding` movement in longitudinal direction of the section, a rear beam section pivotally secured in the rear end ot the front section and carrying at its rear end a plow, the front end of said rear section having a notch adapted to receive the springpressed member, and above said notch a cam adapted to press the spring-pressed member forward when the rear section is returning from a tilted to a normal position, and means for pulling the spring-pressed member forward from the notch, and comparatively strong springs connecting the beam sections together, said sections having a longitudinal play in relation to each other.

t. n a plow, the combination with a rearwardly biiurcated front beam section having near its middle and also near its rear end a longitudinal 'slot in each side, a rear beam section having trunnions extending outward through said rear slots and provided with Xed collars which aid in preventing spreading of the biurcated portion, said rear section also having in its front end a notch and an incline above the notch, a forked block slidable in the front beam section, a pivot extending through the forked portion ot the block and having its ends-projected outward through the slots near the middle of the beam section, and provided with means outside the beam section for preventot spreading o the bifurcation, a roller mounted on the pivot within the 'fork and adapted to engage in the notch of the `rear section and lock the latter against premature tilting, a spring arranged to press thetorlred block rearwardly as far as the slots for the pivot will permit, a manually operated selflocling lever mounted in the front part of the front section and having a rod connecting it with the block; a two-armed lever fulcrumed upon Yeach side ot the rear partot the front section, a pulling coil spring connecting one end of said lever with the collar on the trunnion, and a rod pivotally connecting the other end ot the lever with one of the said collars.

ln testimony whereof l aiiix my signature, in presence of two witnesses.

Y LEVl/TS H. OLSON. llitnesses:

LOUIS T. MCKIM, GEO. T. KILLAM.

Copies of this patent may be obtained for ive cents each, by addressing the "Commissioner of latents, Washington, D. C.

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